I'm 13 and have been getting black stools for the past few months. I went to the doctor with my family to get a stool check up and it was negative. But I still don't know why i'm getting black stools? The stools are sometimes black some brown, I think most of the time its black spots, maybe light patches but I don't think its that. I have also been getting some stomach cramps too. Do you think indigestion can cause black stools? I'm really worried and I don't want to get any diseases like cancer. Maybe it's the way I sit? That would probably bend intestines? I really don't know and i'm really scared. Can someone please help me and try calm me down? Thanks.